Harvester Residue Sensor Shielding Against High-Energy Impacts
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Solution Overview
Problem
Residue sensors on agricultural harvesters, such as combine harvesters, are prone to damage due to high-energy impacts from residue like rocks and corn cobs, which can occur during the residue handling process.
Innovation Solution
The residue sensor is protected by mounting it to various locations on the harvester, including the spreader housing, chopper housing, or a secondary residue travel path, and using air curtains or structural ramps to divert and dissipate the energy of the residue before it reaches the sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the residue sensor is mounted in the residue handling system to sense residue characteristics, then the sensor can detect and measure residue properties, but the sensor is exposed to high-energy impacts from rocks and corn cobs that can damage or destroy it
Solution Approach 1:
A protective housing is introduced as an intermediary structure between the residue flow and the sensor. The housing includes a front wall that intercepts residue particles and a rear wall that positions the sensor in a protected cavity, preventing direct contact between the sensor and high-energy residue impacts while still allowing the sensor to detect residue characteristics through the housing structure
Solution Approach 2:
The protective housing provides beforehand cushioning by creating a physical barrier that absorbs and dissipates the energy of residue impacts before they can reach the sensor. The housing structure is designed to withstand high-energy impacts from rocks and corn cobs, cushioning the sensor from direct exposure to these harmful elements
2Measurement precision
If the residue sensor is mounted close to the residue flow path to accurately sense residue characteristics, then measurement accuracy is improved, but the sensor becomes more vulnerable to direct impact damage from residue
Solution Approach 1:
The protective housing acts as an intermediary that allows the sensor to be positioned close to the residue flow path for accurate measurement while simultaneously protecting the sensor from direct impact. The housing walls serve as a mediator between the residue particles and the sensor, enabling close proximity without direct contact
Solution Approach 2:
The protective housing provides local quality protection by creating a localized safe zone around the sensor. The front wall and rear wall of the housing create a protected cavity where the sensor is shielded from impacts, while still allowing the sensor to detect residue characteristics that pass by or interact with the housing structure
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This protection method significantly reduces the likelihood of sensor damage by minimizing high-energy impacts, ensuring the sensor's functionality and longevity.
Implementation Method 1
The residue sensor can be protected by an air curtain that directs air to inhibit contact between the residue sensor and the residue
Data Source
AI summary
A residue sensor is mounted to a combine harvester to sense a characteristic of residue. The residue sensor can be mounted to a spreader, to a sidewall of a chopper, or in a bypass system. The residue sensor can also be protected by an air curtain that directs air to inhibit contact between the residue sensor and the residue.